Figure 8. Drain current vs VGS and input power (VDD = 28

V, fo = 945 MHz)

0

0.5

1

1.5

2

2.5

3

3.5

4

0

0.5

1

1.5

2

2.5

3

3.5

4

Vgs V)

Pin = .25W Idd

Pin = .5W Idd

Pin = 1.0W Idd

Pin = 1.5W Idd

Pin = 2.0W Idd

Figure 9. Power gain and efficiency vs frequency (VDD =

28 V, Idq = 300 mA tuned at 945 MHz)

20

30

40

50

60

70

80

90

13

14

15

16

17

18

19

20

0

10

20

30

40

50

60

70

80

90

Output power (W)

925 MHz

945 MHz

960 MHz

925 MHz Eff

945 MHz Eff

960 MHz Eff

ST9045C

Typical performance

DS11524 - Rev 3

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